Biden sends top officials to try to win over African nations long-wooed by China and Russia

Treasury Secretary Janet Yellen visits Africa as U.S. tries to improve ties with continent United Nations — The United States’ Ambassador to the United Nations is heading to Africa this week. She’ll be the second member of the Biden cabinet to visit this month as the administration seeks to demonstrate its commitment to addressing the myriad challenges facing the continent, from conflict to climate change. While neither Ambassador Linda Thomas-Greenfield nor Treasury Secretary Janet Yellin, who arrived several days ago, have spoken directly about countering any other nation’s influence, their visits are also a clear bid by Washington to answer…